   Chapter 13, Problem 21PS

Chapter
Section
Textbook Problem

An unopened soda can has an aqueous CO2 concentration of 0.0506 m at 25 °C. What is the pressure of CO2 gas in the can?

Interpretation Introduction

Interpretation: The pressure of carbon-dioxide in can to be identified.

Concept introduction:

Solubility of a gas: It is defined as the concentration of the dissolved gas in equilibrium with the substance in the gaseous state.

Henry’s law: The solubility of a gas in liquid is directly proportional to the gas pressure.

Sg= kHPg,where,Sgisthegassolubility(inmol/kg)kHis Henry's constant Pg is the partial pressure of the gaseous solute.

Explanation

Given data:

Concentration = 0.0506mol/kgkH=0.034 mol/kg.barPCO2=?

According to Henry’s law:

Sg= kHPg

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